2003 Nissan Altima S - Camshaft & Crankshaft Position Sensors

2003 Nissan Altima S 2.5L W/Automatic Transmission PROBLEM: INTERMITTENT NO-STARTS & ROUGH-STARTS WITH NO DTCs SET. A LOCAL AUTOSHOP HAD REPLACED ONLY THE CAMSHAFT POSITION SENSOR, MADE SURE NO DTCs PRESENT AND OPS CHECK GOOD. HOWEVER, THE PROBLEM RETURNED. NOW, THE SAME AUTOSHOP BELIEVES THAT THE FAULT IS WITH THE TRANSMISSION FLEX PLATE, WHICH MAY HAVE DAMAGED THE CRANKSHAFT POSITION SENSOR AS WELL, ACCORDING TO HIM. ESTIMATE IS AT ~$750. The mechanic didn't try to replace the Crankshaft sensor alone, he went straight for the Tranny drop. I figured go with the cheap fix first. If it comes back, then we will look into the Flex Plate. I replaced the recently replaced Camshaft sensor & the never been replaced Crankshaft sensor. So far, so good. Replacing the Camshaft sensor is a 2-minute job. The Crankshaft sensor will likely take 30 times as long. It seems like the Old Crankshaft Position sensor I removed was a bit high on a resistance check, when compared to brand new sensors. With too high a resistance value, the sensor may not make use of the full voltage it is receiving and/or it may not return the required amount of voltage to the Powertrain Control Module (PCM), which will lead to irregular engine operation or a no-start condition. Both Camshaft & Crankshaft sensors are the same part number. The 3rd version of the sensor is encased in metal, not plastic. The OEM part number is 23731-6N21A ($44 us) The old part numbers were encased in plastic. These part numbers should not be used: 23731-8J005 & 23731-8J006 FOR ONLINE PART PURCHASE: http://www.nissanpartszone.com/components/2003-nissan-altima_engine-control-module-226-12.html "DIGITALDXING" PROVIDED THE LINKS LISTED BELOW AND POSTED SOME PICTURES (2003 NISSAN ALTIMA 2.5L) http://x.nissanhelp.com/forums/members/digitaldxing-albums-2003-nissan-altima-crankshaft-position-sensor-picture331-2003-nissan-altima-crankshaft-position-sensor.html#picturecomment_19 "PAUL" POSTED HIS PICUTRES HERE (2002 NISSAN ALTIMA 2.5L) http://www.paulstravelpictures.com/Nissan-Altima-Camshaft-Crankshaft-Sensors/ "DENTNSHELL" POSTED HIS FIX HERE (2005 NISSAN ALTIMA 2.5L) http://dentnshell.com/Projects/2005Altima/CamkPosition.html "MULEMAN" POSTED A GREAT STEP-BY-STEP WRITE UP WITH PICTURES HERE (2006 NISSAN ALTIMA 2.5L) http://www.nissanclub.com/forums/f-q-2002-2006/286857-diy-crankshaft-position-sensor-cps-2006-2-5-altima.html Thanks a bunch, muleman. ...ACTUALLY, THAT WHOLE THREAD AT NISSANCLUB.COM IS A GOOD READ. Yahoo! Answers Best Answer - Chosen by Voters Nissan recalls that problem to reprogram the ECU. What happens the crank sensor electrical terminals seep oil into the crank sensors plug. The new metal crank sensors correct this problem. Location of this sensor on the back of the motor is difficult to change and you need gorrilia finger grip to depress the connector green lock and remove the sensor. Depending on your cars Vin# Recall Campaign # R0712 NHTSA# 07V-527. Hopefully your factory warranty replaces the sensor no charge 5yr/60,000 mile. The campaign only covers the ECM reprogram. The ECM reprogram makes both sensors act as one so either will allow the car to start. Stalling and not starting is a safety risk. Source(s): Nissan Master Technician (John Paul) http://answers.yahoo.com/question/index?qid=20080402214141AA7yQjR For some information on related DTC faults: http://www.obd-codes.com/p0340 http://www.obd-codes.com/p0335 http://www.obd-codes.com/p0385

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Code P0725 / P0335 / P0340 - Crankshaft Positioning Sensor Replacement DIY - Nissan.
Crankshaft Positioning Sensor Replacement Nissan Altima 2003 2.5 SL For this repair you will need to buy one of these replacement parts: 23731-6N21A GENUINE Nissan Crankshaft/Camshaft Position Sensor for Nissan Sentra/Altima/Frontier/X-Trail: http://www.amazon.com/gp/product/B00KBAQHII/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B00KBAQHII&linkCode=as2&tag=dp051- 20&linkId=AUEMMRY7T2CL3IEQ http://www.amazon.com/gp/product/B005ETHH9E/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B005ETHH9E&linkCode=as2&tag=dp051- 20&linkId=UJ3HMM6NOMWLYWNN OR Aftermarket Replacement Parts (not recommended): http://www.amazon.com/gp/product/B00NHD7K9G/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B00NHD7K9G&linkCode=as2&tag=dp051- 20&linkId=3UZA3NBFAM2VNU3P http://www.amazon.com/gp/product/B00QU5M372/ref=as_li_qf_sp_asin_il_tl?ie=U TF8&camp=1789&creative=9325&creativeASIN=B00QU5M372&linkCode=as2&tag=dp051- 20&linkId=PI2TNXYA7BNQTGHD Check Engine Light went off with error codes: P0725 - Engine Speed Sensor P0335 - Crankshaft Positioning Sensor - Sensor A The above codes might be accompanied by Code P0340 - Camshaft Positioning Sensor Circuit Malfunction. Car become hard to start, had rough idle/run, no start for long time if engine is hot, or engine occasionally stalls/shuts off on the traffic light, which is very dangerous... Replacing Crankshaft Positioning Sensor fixed the problem. I replaced the Camshaft Positioning Sensor as well to have both of them brand new. Use the following link to share this video: http://youtu.be/325s0pFQZtg Videos provided on this channel are intended for informational purposes only and cannot be held liable for any injury, damage, or problems that arise when trying to duplicate steps shown in these videos. This information is provided “as is” without any representations or warranties and should not be treated as advise. This information is not guaranteed to be accurate. Do it on your own risk.





Nissan Cam Crank Sensor Testing and Location, Idle relearn procedure
http://airtexenginemanagement.com/homepage.html This video demonstrates how to clean the throttle body on a drive by wire Nissan. It also shows how to perform an idle relearn without a scan tool. "The information presented in this program is based on a specific diagnostic case and might not directly apply to the vehicle you are repairing. We do not represent or warrant that the information presented is complete or error free. Please take all safety precautions. We disclaim any and all liability for losses, injuries or damages in connection with your repair."





How to Test Crankshaft and Camshaft sensors 1
How to Test Crankshaft and Camshaft sensors 1 Amazon Printed Books https://www.createspace.com/3623936 Amazon Kindle Edition http://www.amazon.com/Automotive-Testing-Diagnostic-Strategies-ebook/dp/B00 52YFOCI/ref=sr_1_2?s=digital-text&ie=UTF8&qid=1360016628&sr=1-2&keywords=se nsor+testing%2C+mandy+concepcion Android APPs https://play.google.com/store/apps/details?id=com.app.book.AOTLVEWIWPXAXYGM Z&feature=search_result#?t=W251bGwsMSwxLDEsImNvbS5hcHAuYm9vay5BT1RMVkVXSVdQ WEFYWUdNWiJd Shows the operation and testing procedures of automotive cam and crk sensors, which supply the ECM with engine camshaft and crankshaft position. These two signals are essential for the engine to run. (note: We allow all schools and training institutions to use our software free of charge, so long as it is not sold to others. You're encouraged to download our free automotive simulation software for more information. *************************************************************************** ********* Amazon Printed-Books & Kindle: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dstripbooks&fiel d-keywords=mandy+concepcion Google Play Android APPs: https://play.google.com/store/search?q=mandy+concepcion&c=apps Amazon Video DVDs: http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dmovies-tv&field -keywords=mandy+concepcion Barnes & Noble Nook: http://www.barnesandnoble.com/s/mandy-concepcion?keyword=mandy+concepcion&s tore=allproducts Apple iTunes iPad: http://itunes.apple.com/us/artist/mandy-concepcion/id449573393?mt=11





Replace Nissan 3.5L V6 Camshaft Position Sensor - TCS / SLIP Light - P0345 Code
Video is for 2004 Nissan Quest 3.5 L V6 - 4 speed auto Camshaft Position Sensor Part Number (for Bank 2 / near radiator) 23731-AL61A Camshaft Position Sensor Part Number (for Bank 1 / near firewall) 23731-6J90B ======================================= Code reader used: ELM327 Bluetooth OBDII scanner that interfaces with Android devices with Torque OBD app. ======================================= Video - How To Replace Crankshaft Position Sensor http://youtu.be/rtR5zvqwOpo




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